Pith Number

pith:VVDZH2S5

pith:2017:VVDZH2S5LIE6GL27NIQL6IYIPR

not attested not anchored not stored refs pending

Etherington's Distance Duality with Birefringence

Frederic P. Schuller, Marcus C. Werner

arxiv:1707.01261 v1 · 2017-07-05 · gr-qc · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T00:40:53.299916Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ad4793ea5d5a09e32f5f6a20bf23087c4780b85a2461cbc041f60ecf6d8c218b

Aliases

arxiv: 1707.01261 · arxiv_version: 1707.01261v1 · doi: 10.48550/arxiv.1707.01261 · pith_short_12: VVDZH2S5LIE6 · pith_short_16: VVDZH2S5LIE6GL27 · pith_short_8: VVDZH2S5

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/VVDZH2S5LIE6GL27NIQL6IYIPR \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: ad4793ea5d5a09e32f5f6a20bf23087c4780b85a2461cbc041f60ecf6d8c218b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3fc77fcd21fccc4e3c41e86efb1e266dc32c511fbc727710cd345a2a73c9a5f5",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2017-07-05T08:41:46Z",
    "title_canon_sha256": "a1f3f50d8d1b30c773a21702aa9ae7bda4674c1fdecf69d867909966de887d9b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.01261",
    "kind": "arxiv",
    "version": 1
  }
}